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H2O(g)=H2(g)+1/2O2(g) △H.(298K)=+242KJ/mol 2H2(g)+O2(g)=2H2O(1) △H.(298K)=-484KJ/mol H2(g)+1/2O2(g)=H2O(g) △H.(298K)=+242KJ/mol 2H2(g)+O2(g)=2H2O(g) △H.(298K)=+484KJ/mol
∆G.>0,∆S<0 ∆G<0,∆S>0 ∆G.>0,∆S>0 ∆G<0,∆S<0
∆G>0,∆S<0 ∆G<0,∆S>0 ∆G>0,∆S>0 ∆G<0,∆S<0
392.92kJ 2489.44kJ 784.92kJ 3274.3kJ
Sn+2Cl2=SnCl4 ΔH(298K)=-154.4kJ・mol-1
Sn(s)+2Cl2(g)=SnCl4(s) ΔH(298K)=-545.2kJ
Sn(s)+2Cl2(g)=SnCl4(s) ΔH(298K)=-154.4kJ・mol-1
Sn(s)+2Cl2(g)=SnCl4(s) ΔH(298K)=-545.2kJ・mol-1
H2O(g)=H2(g)+1/2 O2(g) ΔH=+242 kJ/mol 2 H2(g)+O2(g)=2 H2O(g) ΔH=-484 kJ/mol H2(g)+1/2 O2(g)=H2O(g) ΔH=+242 kJ/mol 2 H2(g)+O2(g)=2 H2O(g) ΔH=+484 kJ/mol
离子在某一温度T下的绝对熵与该离子在298K时的绝对熵之间呈直线关系 离子在某一温度T下的绝对熵与该离子在298K时的绝对熵之间呈正比关系 离子在某一温度T下的绝对熵与该离子在298K时的绝对熵之间呈反比关系 离子在某一温度T下的绝对熵与该离子在298K时的绝对熵之间呈抛物线关
CO2(g)+NaOH(aq)=NaHCO3(aq) ΔH=-(2y-x)kJ/mol CO2(g)+NaOH(aq)=NaHCO3(aq) ΔH=-(2x-y)kJ/mol CO2(g)+NaOH(aq)=NaHCO3(aq) ΔH=-(4x-y)kJ/mol 2CO2(g)+2NaOH(l)=2NaHCO3(l) ΔH=-(8x-2y)kJ/mol
CO2(g) + NaOH(aq) = NaHCO3(aq) H= -(2y-x) kJ/mol CO2(g) + NaOH(aq) = NaHCO3(aq) H= -(2x-y) kJ/mol CO2(g) + NaOH(aq) = NaHCO3(aq) H= -(4x-y) kJ/mol 2CO2(g) + 2NaOH(l) = NaHCO3(l) H= -(8x-2y) kJ/mol
理想气体从101325Pa__恒定的10132.5Pa膨胀到10132.5Pa 在0℃、101325Pa下,冰融化成水 电解CuSO4的水溶液 气体从(298K,101325P可逆变化到(373K,10132.5P
2C(石墨)+2O(g)=2CO(g)△H=-394kJ/mol C+O=CO△H=394kJ/mol C(石墨)+O(g)=CO(g)△H=-394kJ/mol C(石墨)+O(g)=CO(g)△H=394kJ/mol
CO2(g)+NaOH(aq)===NaHCO3(aq);ΔH.=-(2y-x)kJ·mol-1 CO2(g)+NaOH(aq)===NaHCO3(aq);ΔH.=-(2x-y)kJ·mol-1 CO2(g)+NaOH(aq)===NaHCO3(aq);ΔH.=-(4x-y)kJ·mol-1 2CO2(g)+2NaOH(l)===2NaHCO3(l);ΔH.=-(8x-2y)kJ·mol-1
CO2(g)+NaOH(aq)=NaHCO3(aq)△H=﹣(2y﹣x)kJ·mol﹣1 CO2(g)+NaOH(aq)=NaHCO3(aq)△H=﹣(2x﹣y)kJ·mol﹣1 CO2(g)+NaOH(aq)=NaHCO3(aq)△H=﹣(4x﹣y)kJ·mol﹣1 2CO2(g)+2NaOH(aq)=2NaHCO3(aq)△H=﹣(8x﹣y)kJ·mol﹣1
CO2(g)+NaOH(aq)=NaHCO3(aq) △H=-(2y-x)kJ・mol―1 CO2(g)+NaOH(aq)=NaHCO3(aq) △H=-(2x-y)kJ・mol―1 CO2(g)+NaOH(aq)=NaHCO3(aq) △H=-(4x-y)kJ・mol―1 2CO2(g)+2NaOH(aq)=2NaHCO3(aq) △H=-(8x-2y)kJ・mol―1